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View Full Version : Cheaper Hydrogen launch vehicle



bactbob
2015-Nov-20, 05:50 PM
I'd like to propose using a launch vehicle that is cheaper that most systems in place (not necessarily safer or faster).
We can use Hydrogen balloons to lift a payload to the upper atmosphere,
then, with on-board oxygen tanks. fire off a small rocket using H2+O2 combustion to lift the system to a low orbit (if possible)
The empty shell can then be a solar sail.

There is a web page outlining the features, but as a newbie, I can't post it here :)

Thanks
Bob

publiusr
2015-Nov-21, 06:57 PM
The cheapest liquid fueled LV I can think of are pressure-feds


"Lutz Kayser, the former head of the OTRAG team, is an important consultant on the IOS project."
http://www.interorbital.com/interorbital_06222015_012.htm

India has cheap steel what with its shipbreaking yard--and they are building large sub hulls.

Sea Dragon would be perfect for them--and cheaper than subs.

Hydrogen demands wide diameter tankage. Since the internal volume increases by the cube as the surface area only goes up by the square--size is your friend with respect to LH2